r0 = socket$netlink(0x10, 0x3, 0x0)
sendmsg$nl_generic(r0, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000100)={0x20, 0x18, 0x1, 0x0, 0x0, {0xa, 0x2}, [@typed={0x8, 0x0, 0x0, 0x0, @ipv4=@loopback}, @nested={0x4, 0x1}]}, 0x20}}, 0x0)